BATON ROUGE - An East Baton Rouge sheriff's deputy wounded in an ambush attack in 2016 is still fighting to recover nearly two years later.

On Monday, the 'Nick Tullier Strong' Facebook page, run by the deputy's family and friends, announced that he was taken to the Emergency Room Sunday afternoon. On Monday, he was back in the Intensive Care Unit with pneumonia, according to tests taken at the hospital. 

The page says the hospital is using special equipment to help Tullier breathe as he battles what appears to be pneumonia in both lungs.

Tullier is one of two officers who survived the deadly shooting on Airline Highway in July 2016, which took the lives of three local law enforcement officers. The deputy was shot in the attack, leaving him in critical condition.

Tullier has made significant progress since the shooting, though he has remained in various hospitals for the past 21 months.